Heel-attaching machine



p 1939- .1. GOULDBOURN El A1. 2,173,964

HEEL-ATTACHING MACHINE Filed May 18, 1938 6 Sheets-Sheet 1 p 26 1939. J.GOULD'BOURN ET AL 2,113 964 HEEL-ATTACHING MACHINE Filed May 18, 1938 6Sheets-Sheet 2 p 26, 1939. J. GOULDBOURN AL' 2,173,964

HEEL-ATTACHING MACHINE Filed May 18, 1938 e sh eet-Sheet 5 I WVE/VTURE WQKM Se t. 26, 1939. J. GOULDBOURN ET AL HEEL-ATTACHING MACHINE Filed Ma18, 1938 s Sheets-Sheet 4 Fig Z p 26, 1939- J. GOULDBOURN mm. 4

HEEL-ATTACHING MACHINE Filed May 18, 1938 6 Sheets-Sheet 5 Sept. 26,1939. J. GOULDBOURN Er AL HEEL-ATTACHING MACHINE Filed May 18, 1938 6Sheets-Sheet 6 M Z/QM C, $40-14; @44- Patented Sept. 26, 1939 UNITEDSTATES PATENT OFFICE Machinery C'orporatiomPaterson, N. J., acorporation of New Jersey Application May 18, 1938, Serial No. 208,628In Great Britain July 31, 1937 32 Claims.

This invention is concerned with improvements in machines for attachingheels to shoes. The term heel, as used herein, may indicate either acompleted heel or a part thereof, such as a top-piece. The invention isof especial utility in connection with machines adapted to attach a heelto a shoe by such fastenings as nails driven through the heel into theshoe and also to secure a top-piece to the attached heel.

Machines of the character above indicated are generally capable ofperforming both the attaching operations only when the operator hascaused the machine to perform two distinct operating cycles under powerand controlled by two treadle-depressions. In accordance with one of theseveral features of the invention, there is provided a novel machinewhich, on a single depression of the treadle, is effective automaticallyto perform in sequence the operations of heelattaching andtop-piece-securing. This reduces the eifort required in operating themachine and therefore increases the output.

The above and other features of the invention, including those relatingto the positioning of 2, heel-parts, as by the operation of aswing-plate having heeland top-piece-holders, will become evident fromthe following description of an illustrative machine in which theseveral features are included.

In the accompanying drawings of a particular embodiment of ourinvention:

Fig. l is a side elevation taken from the left of the illustrativemachine, this figure being to a smaller scale than the succeedingfigures;

Fig. 2, a side elevation of the lower portion of the machine;

Fig. 3, a rear elevation corresponding to Fig. 2;

Fig. 4, a section on the line IVIV of Fig. 2;

Fig. 5, a sectional plan, showing chiefly the Al) swing-plate of themachine and more closely associated parts;

Fig. 6 a plan view of manual controlling means for the pressuremechanism, seen also in Fig. 1;

Fig. 7, a side elevation taken from the left in Fig. 6;

Fig. 8, a view, chiefly in section, on the line VIIIVIII in Fig. 5, and

Fig. 9, a left-hand side elevation to a smaller scale than Figs. 2 to 8,showing in particular a gear of the machine having cam-tracks.

A lasted shoe which is to be operated upon is presented to the machine,bottom downward and heel-end to the rear, the crown of the last beingengaged during the operation of themachine by a reciprocatorypressure-head I (Fig. l) The shoe may be positioned by a band-clamp 3with which the back and sides of the heel-end of the upper contact. Themachine is shown as equipped for attaching a heel and thereafterapplying a top-piece to the attached heel, there being provided aswinging heel-holder l9, 2| and a top-piece-holder 23, 25, hereinaftermore particularly described. These holders are carried by a swing-plate5 arranged over a nailingblock 'I, through holes in which nails aredriven through the heel into the shoe in the attachment of the heel(Fig. 5).

There will first be outlined briefly the manner of operation of such amachine of known characteristics and thereafter our invention describedas applied to it. At the conclusion of an operating cycle, the machinecomes to rest with the top-piece-holder positioning device 23, 25 of theswing-plate 5 in its active position above the nailing-block. A pivotednail-transferring device or loader 9, which will previously have beensupplied with nails, either manually or by an automatic distributor,will be swung manually over the block. Then a heel will be placed in theholder l9, 2| and a top-piece in the holder 23, 25. During the movementof the loader between the nail-receiving position and the deliveringposition, the nails are retained by a movable gate or shutter ll. Whenthe loader reaches a position in which its nail-carrying openingsregister with those in the block I, the gate H is released forspring-movement to allow the nails to fall into the nailing-block. Theswing-plate 5 is so connected to the loader 9 that when the latter ismoved into position over the nailing-block i, it causes movement of theswing-plate to carry the top-piece-holder to the right and to bring theheel-holder into active position, as appears in Fig. 5. The heel-holderpresents a space through which the nails may fall. In thenail-delivering travel of the loader, a stud i3 whichit carries movesalong an inclined surface of a cam member l5 (Fig. 1) connected with aslide I'I carrying the band-clamp. This is effective to lift theband-clamp well above the nailing-block. After the delivery of nails tothe block, the loader is swung reversely, and when it is just clear ofthe block, but before it has moved sufficiently toward its receivingposition to allow the band-clamp to move downwardly, a heel H isinserted in the heel-holder. The band-clamp is at this stagesufficiently elevated by the stud l3 and cam I5 to give plenty of roomfor the application of the heel. The heelholder may comprise thespring-actuated breastbar I9 and the spring-pressed rear fork 2I. Theloader is then swung fully to its nail-receiving position, and, duringthis movement, the gate II is latched once more in nail-retainingrelation, and the band-clamp is allowed to move downwardly toward theheel H positioned upon the swing-plate. Next, a top-piece T is insertedin the holder 23, 25, it being located by the springactuated breast-bar23 and the spring-pressed rear fork 25.

The operation now inserts a shoe, bottom down, rearwardly, so that theband-clamp embraces the lower margin of the upper at the sides and rearof the heel-end, the heel-seat of the shoe being then located just abovethe attaching face of the heel in the holder I9, 2I. If the shoe is of astyle which requires the band-clamp to be swung laterally in accordancewith whether the shoe is a right or a left, a hand-lever 21 provided forthis purpose will be operated. The treadle 29 of the machine is nextdepressed. The movement is first effective to lower the head I intoengagement with the cone of the last in the shoe to apply preliminarypressure of the shoe to the heel, the band-clamp 3 being moveddownwardly at the same time and its sides being carried toward eachother to grip the shoe between them, the gripping movement beingconcluded before the band-clamp is fully lowered. The treadle 29 ispivotally connected to an upwardly extending treadle-rod 3| (Figs. 1 andwhich is lifted when the treadle is depressed. and which at its upperend is pivotally connected to an arm 33, the forward end of which isfixed to a rockshaft35 extending laterally of the machine. This is as inLetters Patent of the United States No. 2,085,851, Gouldbourn et al.,July 6, 1937. The rockshaft 35 carries a rearwardly projecting arm 31pivotally connected, through a link 39 hereinafter described, to anupwardly extending rod II. The rod is coupled by elements 49 and 41 toan arm 43 having gear-teeth 45 on its forward end meshing with a rack 46upon a vertically movable plunger 5I carrying the pressure-head I. Thetreadle is thus effective to move the arm 43 to lower the plunger andforce the head against the last within the shoe being operated upon. Thelowering of the band-clamp is effected by connections to the plungerconsisting of the slide H, the link 53 and the lever 55. It is closedupon the shoe by the link 51, the bell-crank-lever 59 and thetoggle-lever 63, 65, the element 65 being joined to the arm 31.

When the first part of the depression of the treadle 29 has beencompleted to effect lowering of the pressure-head I and lowering andclosing of the band-clamp 3, further depression is effective to trip theclutch of the machine and initiate its power-operation. Once the clutchhas been tripped, the operator may release the treadle, since theoperation of the machine will proceed independently of the treadle, andthe clutch will be disengaged automatically at the end of the operatingcycle. During this power-operation, the sequence of events is asfollows. The head I applies a definite final or clamping pressure toforce the shoe and heel firmly together. The heel-attaching nails arethen driven from the block 7 through the heel and into the shoe, theirend-portions being left slightly projecting from the bottom of the heelto receive the top-piece. The head I, and therefore the band-clamp 3,are then raised by automatically operating toggle means, as hereinafterdescribed and without calling for any further act on the part of theoper ator, through a predetermined distance, conveniently aboutthree-quarters of an inch. During this movement, the arm 31 remainsstationary, and thus the side-portions of the band-clamp 3 do notseparate to release their hold on the shoe, which is therefore properlypositioned. As the shoe is moved upwardly, the drivers in the block Iare retracted. Further, at this time, the swing-plate 5 of the machineis tripped, by means to be described, and it is swung under springactiontoward the left, so that the heel-holder I9, 2| is moved to the leftfrom above the block, and the holder 23, 25 moves the top-piece carriedby it over the block and underneath the attached heel. The elevation ofthe heel from the nailingblock previously mentioned, allows sufiicientclearance for the top-piece to be brought beneath the heel. When thetop-piece is thus positioned, the head I is moved down by a returnmovement of the previously mentioned toggle means, taking the band-clampand the shoe with it, so that the bottom of the heel exerts preliminarypressure upon the top-piece. Before the completion of the returnmovement of the toggle means, the head I places upon the work the samepredetermined final pressure as was applied prior to the driving of theheel-attaching nails. This causes the toppiece to be forced upon theends of the nails projecting from the heel and thus secured thereto.Finally, the head I is raised to the top of its stroke, and the clutchof the machine is automatically disengaged. At this time, the rod 4| isallowed to descend, so that the head is returned to its original fullyelevated position, the bandclamp moving upwardly with it and opening torelease the shoe, which is then removed, leaving the machine ready forthe succeeding operation. The construction and arrangement of variousparts of the machine which effect the movements above outlined will nowbe described.

At the rear of the machine is a constantly driven pulley 61, which maybe connected to the main shaft 69 of the machine by a clutch KI (Fig. 3)actuated from the treadle 29, which effects the clutching only aftersaid treadle has been depressed to efiect the preliminary lowering ofthe head I. The treadle is pivoted on a stud 13 carried by a lever whichis itself pivoted on a stud TI to the frame (Fig. 2). During the firstpart of its depression, the treadle turns about the stud I3, and, on thefurther depression, it moves with said lever I5 about the stud TI toactuate the clutch through a rod 18. The shaft 69 has two pinions fixedthereto, the pinion I9 meshing with a gear 8| fixed to a shaft 83journaled in the frame below the shaft 59, and the pinion 85 meshingwith a gear 81 rotatable about the shaft 83. The gear 8I turns the shaft83 at a speed which is in the ratio of two to five to the speed of themain shaft. The gear 8'! is rotated on the shaft 83 at a speed which isin the ratio of one to five to the speed of the main shaft, or half thatof the gear 8|. The shaft 83 has secured to it a crank 89 connected by alink 9| to a member 93 pivoted on a stud 95 and which has a cam-surface9'! engaged by a roll 99 carried by a plunger I 0| which operates thenail-drivers of the machine.

. Fast on the gear 81 is a sleeve I03 on which is fixed a stop-cam I05.This cam so acts upon a roll m on a lever I09 fulcrumed on the framethat it is efiective to throw out the clutch H when the gear 81 has madeone revolution. Thus, during each operating cycle of the machine, thegear 81 rotates once, the gear 8| and the shaft 83 rotate twice, whilethe main shaft 69 is being turned by the driving pulley 61 five times.In the gear 81 are formed two cam-tracks. The outer, I I I (Fig. 9)receives a roll H3 at the lower end of a lever Il5 fulcrumed about arockshaft II1 journaled transversely of the machine-frame. The lever II5 extends rearwardly from the rockshaft I I1 and is pivotally connectedto the lower end of a rod I I9, the upper end of which is joined to alever I2I (Fig. 1) which is effective to apply clamping pressure to thework, as in the patent to Gouldbourn et al. The cam-track III is soshaped that during one revolution of the gear 81, the head I has the twodownward and upward movements imparted to it, which are respectively foreffecting the final pressing of the heel on the shoe and the top-pieceon the heel.

In the inner cam-track I23 of the gear 81 is a roll I25 on one arm I21of a bell-oranklever which is fixed within the frame to the rockshaftH1. The other arm I29 of the lever is connected by a bolt I3I, whichpasses through an arcuate slot I33 in the frame, with the lower end of alever I 35 (Fig. 3) fixed to the rockshaft H1. The lever I35 and thebell-crank-lever I21, I29 move together and, in effect, may be regardedas a single element. The lever I35 has an upwardly extending portionwhich is connected, by means hereinafter described, with the rearwardend of a link I31 of adjustable length (Fig. 1), which extends forwardlyand at its forward end is pivotally connected to a stud I39 at the lowerend of the rod 4|. Also pivotally connected to the stud I39 is the upperend of the link 39, the lower end of which is joined to the arm 31, asalready mentioned. The link 39 and the rod 4|, in effect, furnish thearms of a toggle, and the arrangement is such that this toggle isnormally substantially straight but is broken to cause'the automaticlift of the head I and the band-clamp 3, which occurs between theheel-attaching and top-piece-securing operations. After the treadle 29has been depressed through the first part of its stroke, and the poweroperation of the machine begins, means hereinafter described is broughtinto operation to lock the lower end of the link 39 positively in itstreadle-produced position against upward movement and to prevent itmoving downwardly, except under considerable pressure. When the stage isreached at which it is desired to lift the head I and band-clamp 3 toallow the top-piece to bebrought under the heel, the lever I35, which iscontrolled from the cam-track I23, pulls the link I31 rearwardly. Sincethe lower end of the link 39 is then prevented from moving upwardly, therod M will be moved downward, and this will be effective through partsalready described to raise the head and band-clamp 3. After thetop-piece has been positioned below the heel, the upper end of the leverI35 moves forward, again straightening the toggle 39, M and causing thehead and band-clamp to be moved downwardly once again to press thebottom of the heel on the shoe against the top-piece. It will berealized that owing to the thickness of the top-piece andthe swing-plate5 on which it is carried, the head I will not move downward to the levelit occupied during the heelattaching operation. Therefore, to preventundue strain as the toggle is straightened, the lower end of the link 39is permitted to move downwardly under pressure.

The means for locking the lower end of the link 39 against upwardmovement while permitting it to move downwardly under pressure is asfollows. Fixed tothe side of the frame isacasing MI in which is formed acylinder I43 (Figs. 1 and 8). In this cylinder is movable a piston Ifrom which a piston-rod I41 extends upwardly. This rod passes throughthe top of the casing and has at its upper end a member I49 in which isa hori zontal slot I5I receiving a sliding block I53 attached to one endof a stud I55, the opposite end of which furnishes the pivot between thelink 39. and the arm 31. A passage I51 is provided in the casing I4Iconnecting the opposite ends of the cylinder I 43. The passage I51 andthe cylinder I43 are full of a fluid, which may be oil, and a valve-bodyI59 is provided in the passage controlled by a valve-head I6I at thelower end of a valve-rod I63 pressed down by a spring I 65 which tendsto maintain the valve closed. The upper end of the valve-rod has a slotI61 in which is a roll I69 mounted on an arm I1I, which at its forwardend is pivoted to a stud I13 upon a coverplate I15 which closes thecasing I4 I. At its rearward end, the arm I1I carries a pin I11 enteringa slot I19 formed in a member I8I secured to the upper end of a verticallink I83, which at its lower end is connected to the clutch-disengaginglever I69 (Fig. 2). The arrangement is such that when the clutch H ofthe machine is not engaged, the valve-rod I63 is maintained in an upwardposition in which the valve is open. Under these circumstances, thepiston I45 is permitted to move in its cylinder, the oil circulatingfreely in the passage I51. Flow of oil to and from a reservoir I85 in.the casing from or to the passage I51 and cylinder I43 is permittedthrough a bore I81 in the valve-rod I63. This compensates for changes inthe effective volume of the cylinder and passage due to movement of thepiston-rod I41 and valverod I63. When the valve I59 is open, thepistonrod I41 does not interfere with movement of the arm 31, consequentupon the first part of the depression of the treadle 29. When, however,the clutch H of the machine is engaged, the valverod I63 is allowed tomove downwardly to close the valve. This looks the piston against upwardmovement, since any tendency toward such movement serves, through theoil, to force the valvehead I6I more firmly against its seat. Thus, at

the time that the lever I35 is actuated to break the toggle 39, M, thelower end of the link 39 is locked against upward movement by thepistonrod. When, however, the toggle is again straightened during theoperation of the machine, the link is permitted to move downwardly underpressure, since the piston-rod I41 is capable of downward movement whena predetermined pressure is reached. This pressure is that necessary toopen the valve I59 in the passage I51 by raising the head I6I from itsseat against the action of the spring I65. When, at the end of anoperating cycle of the machine, the clutch 1| is automaticallydisengaged, as hereinbefore described, the lever I09 is swung in suchdirection that the valve-rod I63 is raised against its spring, therebyopening the valve I59 and allowing the machine to stop in a condition inwhich the lower end of the link 39 is capable of moving at thebeginningof the next operation of the machine under the action of thearm 31.

In heel-attaching machines, it has been usual when a swing-platecarrying a heel-holder and a top-piece-holder is provided, to arrangethat the swing-plate, isshifted by a spring from the position in whichthe heel-holder is above the nailing-block to that in which thetop-piece holder is positioned above the block, The spring is tensionedor loadedwhen thenaile-transferring de- 75,

vice is moved manually from its nail-receiving to its nail-deliveringposition, and this may cause the effort of moving the transferringdevice to be undesirably heavy. In the illustrative machine, whichautomatically performs the heel-attaching and top-piece-securingoperations in sequence, it is desirable that the swing-plate 5 should bemoved quickly between the position in which the heel-holder I9, 2| isabove the nailing block I and that in which the top-pieceholder 23, 25is thus positioned. In the present machine, this movement is alsoeffected by spring means, which should be capable of rapid action. Ifthe main effort of loading said spring means had to be performedmanually, it might be undesirably large. Accordingly, we provide anarrangement whereby the loading of the spring is performed largely underthe: power of the machine. At the rear, the swing-plate 5 is fixed tothe upper end of a vertical shaft I89 (Fig. 5) which is journaled inbearings adjacent to the nailing-block I. Fixed to the shaft is a shortarm I9I to which is pivotally connected one end of a link I93, the otherend of which is joined by a pin-and-slot connection I95 to thenailtransferring device 9, which is pivotally mounted for movement abouta vertical shaft I9I at the rear and to the right of the shaft I89. Theorganization is such that as the nail-transferring device is moved overthe nailing-block, the link I93 is effective to shift the swing-plate 5counterclockwise, as viewed from above, to remove the top-piece-holderfrom above the nailing-block and bring the heel-holder into positionabove the block. The shaft I89 to which the swingplate 5 is fixed hasfast upon it an arm I99 extending toward the right. To the end of thisarm I99 is attached a tension-spring 201, which at its forward end isconnected to the nailing-block. As the swing-plate is moved by thenail-transferring device 9, this spring 20I is tensioned, but it iscomparatively weak and offers no marked resistance to the movement ofthe transferring device. When the swing-plate 5 has reached the positionin which the top-piece-holder is above the nailing-block, a latch 203(Fig. 5) is effective to retain it until it is released, as will bedescribed. Secured to the shaft I89 is a second arm 205, and to this armis pivotally connected a swing-plate-actuating rod 201 which extendsinto the frame. This rod passes through a hole in a stud 209 connectedwith the lever I35 (Figs. 6 and 7). Fixed upon the rod is a collar 2,and surrounding the rod between this collar and the stud is acompression-spring 2I3. As the upper end of the lever I35 is movedrearwardly by the cam I23 to break the toggle 39, 4|, the studcompresses the spring 2 I3. The spring, as it is compressed, tends tomove the swing-plateactuating rod 201 rearwardly, but this rod isprevented from moving in this direction because the swing-plate 5 isheld by the latch 203. This latch is pivoted on a fixed pin 2I5 and hasa hooked end-portion 2II lying in the path of movement of the rod 4| asthis rod is moved to break the toggle 39, 4| and lift the head I. Thearrangement is such that when the lower end of the rod has almostcompleted its movement toward the rear during the breaking of thetoggle, at which time the head I of the machine has been raisedsubstantially to the full extent for this stage in the operation of themachine, and the spring 2I3 has been loaded, it contacts with a screw2I9 threaded into the portion 2|! of the latch to cause release of saidlatch. A torsionspring22I' about the pin 2I5 urges the latch 203 towardits active position. Upon release of the latch, theswing-plate-actuating rod 201 is pulled quickly to the rear by itsspring 2 I3, so shifting the swing-plate that the top-piece-holder isabove the nailing-block I. The swing-plate may be prevented fromstriking violently against the stop-surface at the end of its travel byconnection to a small piston (not shown) forming part of an air-check,which does not interfere with the rapid movement of the swing-plate.

The means whereby the upper end of the lever I35 is connected to thelink I3'I which joins it to the toggle 39, 4| will now be described morefully. Pivotally connected to a stud 223 on the upper end of the leverI35 is a bell-crank-lever, one double arm 225 of which (Figs. 6 and '7)extends rearwardly and carries the stud 209, to which are connected thelink I31 and the rod 201. other arm 22'! of the bell-crank-lever extendsupwardly and carries a hand-knob 229. Also attached to the arm 22'!isthe upper end of a spring 23I lying normally, as shown in Fig. 7, tothe rear of the pivot-stud 223, with its lower end joined to a pin 233on the lever I35. In this relation, the spring tends to hold the arm 225of the bell-crank-lever extending rearwardly and resting against a lug234 upon the lever I35, and when the lever I35 is moved rearwardly tobreak the toggle 39, 4|, the pull is transmitted through i thebell-crank-lever to the link I3! which is joined to the center of thetoggle. Now, it may sometimes be desired to operate the machine so thatduring the operating cycle, the toggle 39, 9| is not broken to lift thehead I. To this end, the hand-knob 229 on the bell-crank-lever is movedby the operator to swing the bell-crank-lever clockwise about its pivot,as viewed in Fig. 7. The spring 23I is thereby carried in front of thelever-pivot and tends to hold the arm 225 in its new position against astop 235 fixed to the frame of the machine. When the parts are thusrelated, and the upper end of the lever I35 is moved rearwardly duringthe operation of the machine, no effective rearward pull is imparted tothe link I31 joined to the center of the toggle 39, 4|. This is becausethe bell-crank-lever 225, 221 will merely swing about its pivot withoutimparting to the link I31 sufiicient pull to break the toggle,

which may be so arranged that under these cir- I cumstances, its centeris very slightly in advance of its dead-center line. Thus, the lever I35merely moves idly, and the toggle is not broken to lift the head I. Thiscontrol may be utilized if it is desired to attach a heel to a shoewithout securing a top-piece to the heel. With the parts so arranged,since the lower end of the rod 4| forming the upper member of the toggle39, 4| will not be moved rearwardly, the swing-plate 5 will not beunlatched but will remain during the whole operation of the machine withthe heelholder I9, 2| above the nailing-block I. In the ordinary way,the pressure-head I will be moved down twice during the operating cycle,so that the Work will be subjected in succession to two compressingoperations. It may sometimes be desired to use the machine merely tosecure a top-piece to an already attached heel; for example, if a faultytop-piece has been initially attached, and this has been removed and isto be replaced by another. Under these circumstances, also, the machinewill be adjusted so that the toggle 39, 4| is not broken during itsoperation. In this case, the swing-plate 5 will be located during thewhole operation with the top The;

piece-holder above the nailing-block I. When such operation isperformed, it will be found that the two compressing operations to whichthe work is subjected during the operating cycle are effective in givingvery secure attachment of the top-piece. It will be realized that theactuation of the hand-knob 229 to change the machine from a condition inwhich the automatic lift of the head I takes place into one in which thelift does not occur, or vice versa, may be effected rapidly by theoperator, merely by a quick movement of his hand.

Having described our invention, what we claim as new and desire tosecure by Letters Patent of the United States is:

1. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable to force the work toward the attachingmechanism, operator-actuated means for moving the member to applypreliminary pressure to the work, means movable under the power of themachine for actuating the member a plurality of times during eachoperating cycle to apply final pressure to the work, and means forretracting the member between the applications of final pressure.

2. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable to force the work toward the attachingmechanism, operator-actuated means for moving the member from an initialposition into engagement with the work, means movable under the power ofthe machine twice during each operating cycle to force the memberagainst the work from such engaging position, and means for withdrawingthe member from engagement with the work between the power-applicationsof pressure.

3. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, a treadle, connections to the treadle by whichthe head may be moved into engagement with the work upon the block, andmeans acting under the power of the machine upon the connections betweenthe treadle and head to withdraw said head from engagement with thework.

4. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, a treadle, connections to the treadle and.including the arms of a toggle by which with said arms in substantialalinement the head may be moved into engagement with the work upon theblock, and means acting under the power of the machine for breaking thetoggle.

5. In a heel-nailing machine, a nailing-block, a plunger movable towardand from the block, a pressure-head carried by the plunger andcooperating with the block, a treadle, a member actuated by the treadleand by which the plunger is moved toward and from the block, a membermovable under the power of the machine and by which the plunger is movedtoward and from the block twice during each operating cycle, meansincluding a toggle for connecting the treadle to the member which itactuates, and means for breaking the toggle between the power movementsof the plunger.

6. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism,elements through which the member is moved, means for allowing theelements toyield, and means made effective during the operation of themachine for varying the resistance offered by the yieldable means,

7. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism,elements through which the member is moved, means for allowing theelements to yield, power means by which the machine is operated, acontrolling member for the power means, and means connected to thecontrolling member for varying the resistance ofiered by the yieldablemeans.

8. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism,elements through which the member is moved, means for allowing theelements to yield, operator-actuated means acting upon the elements tomove the member, means acting upon the elements to move the member underthe power of the machine, and means for increasing the resistanceofiered by the yieldable means during the power operation of the member.

9. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism,elements through which the member is moved, and fluid means for allowingone of the elements to yield after the travel of the pressure member hasbeen arrested by engagement with the Work,

10. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism,elements through which the member is moved, fluid means for allowing oneof the elements to yield, and means movable under the power of themachine for varying the resistance of the fluid means to movement.

11. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism, a leversystem connected to the pressure member, plural actuating membersconnected to the lever system, an hydraulic device to which oneextremity of the lever system is joined, and means for varying theresistance to movement offered by the hydraulic device for differentactuating members.

12. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism, a leversystem connected to the pressure member, an actuating member connectedto the lever system, a piston to which one extremity of the lever systemis joined, a cylinder containing a fluid and in which the pistonoperates, and means for controlling the flow of fluid between theopposite extremities of the cylinder.

13. Ina heel-attaching machine, attaching mechanism for heel-parts, apressure member movable toward and from the attaching mechanism, a leversystem connected to the pressure member, an actuating member connectedto the lever system, a piston to which one extremity of the lever systemis joined, a cylinder containing a fluid and in which the pistonoperates, and means yieldable upon the application of a predeterminedpressure for controlling the flow of fluid between the oppositeextremities of the cylinder.

14. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, moving means for the pressure-head including atoggle, means for straightening and breaking the toggle under the powerof the machine, and a treadle joined to the toggle to operate thehead-moving means in the straightened condition of the toggle.

15. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, a toggle connected at one extremity to the head,a piston connected to the opposite end of the toggle, a cylinder inwhich the piston is movable, and means for varying the resistance of thepiston to movement in the cylinder.

16. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, a toggle connected at one extremity to the head,a piston connected to the opposite end of the toggle, a cylinder inwhich the piston is movable, and means connected to the center of thetoggle and movable under the power of the machine for straightening andbreaking said toggle.

17. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, a toggle connected at one extremity to the head,a piston connected to the opposite end of the toggle, a cylinder inwhich the piston is movable, and a valve movable under the power of themachine for varying the flow between the opposite sides of the piston.

18. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, a toggle connected at one extremity to the head,a piston connected to the opposite end of the toggle, a cylinder inwhich the piston is movable, a valve movable under the power of themachine for varying the flow between the opposite sides of the piston,and a spring by which the valve is held initially upon its seat.

19. In a heel-attaching machine, attaching mechanism for pluralheel-parts, a movable device provided with plural holders forsuccessively presenting heel-parts to the attaching mechanism, meansincluding a spring for moving the device, and means movable under thepower of the machine for loading the spring to prepare it for its actionupon the device.

20. In a heel-attaching machine, attaching mechanism for pluralheel-parts, a movable device provided with plural holders forsuccessively presenting heel-parts to the attaching mechanism, meansactuated by the operator for moving the device in one direction, meansfor temporarily retaining the device in the position to which it is thusmoved, and means for moving the device in the opposite direction bypower resulting from the operation of the machine.

21. In a heel-attaching machine, attaching means for. heel-parts, apressure member movable to force the work toward the attachingmechanism, means for moving the pressure member, a movable deviceprovided with a plurality of holders for successively presentingheel-parts to the attaching mechanism, means including a spring formoving the device, and means actuated by the moving means for thepressure member for loading the spring.

22. In a heel-attaching machine, attaching means for heel-parts, apressure member movable to force the work toward the attachingmechanism, means for moving the pressure member, a movable deviceprovided with a plurality of holders for successively presentingheel-parts to the attaching mechanism, means including a spring formoving the device, means actuated by the moving means for the pressuremember for loading the spring, means for retaining the device againstthe force of the spring, and means acting under the power of the machinefor releasing the retaining means.

23. In a heel-attaching machine, attaching means for heel-parts, apressure member movable to force the Work toward the attachingmechanism, means for moving the pressure member, a movable deviceprovided with a plurality of holders for successively presentingheel-parts to the attaching mechanism, means including a spring formoving the device, means actuated by the moving means for the pressuremember for loading the spring, means for retaining the device againstthe force of the spring, and means actuated by the moving means for thepressure member for releasing the retaining means.

24. In a heel-attaching machine, attaching means for heel-parts, apressure member movable to force the work toward the attachingmechanism, means for moving the pressure member, a movable deviceprovided with a plurality of holders for successively presentingheel-parts to the attaching mechanism, means including a spring formoving the device, means for retaining the device against the force ofthe spring, a second spring, and means for loading the second springunder the power of the machine to prepare it for its action upon thedevice.

25. In a heel-nailing machine, a nailing-block, a swing-plate havingheeland top-lift-holders for presentation to the nailing-block, a springjoining the swing-plate to a relatively fixed point, a latch for holdingthe swing-plate against the force of the spring, a rod connected to theswingplate, a spring surrounding the rod, means for moving the rod underthe power of the machine to compress the spring, and means acting underthe power of the machine for releasing the latch.

26. In a heel-nailing machine, a nailing-block, a movable pressure-headco-operating therewith, a lever by which the head is moved toward andfrom the block, a member movable under the power of the machine foractuating the lever, a swing-plate having a heel-holder and atop-liftholder, a spring for moving the swing-plate, said spring beingloaded by movement of the actuating member, and a latch for retainingthe swingplate against the force of the spring, the latch being releasedin the movement of the lever.

27. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable to force the work toward the attachingmechanism, means for producing initial and final movement of thepressure member toward and from the attaching mechanism, means forproducing under the power of the machine intermediate movements of thepressure member from and toward the attaching mechanism, and meanscontrolled by the operator for preventing the action of the intermediatemovement-producing means while the first-mentioned movements maycontinue.

28. In a heel-attaching machine, attaching mechanism for heel-parts, apressure member movable to force the work toward the attachingmechanism, means for producing initial and final movement of thepressure member toward and from the attaching mechanism, means forproducing under the power of the machine intermediate movements of thepressure member from and toward the attaching mechanism, means movableduring such intermediate movements to present a heel-part to thepressure mechanism, and means controlled by the operator for preventingthe action of the intermediate movement-producing means and the movementof the presenting means.

29, In a heel-nailing machine, a nailing-block,

a pressure-head movable toward and from the nailing-block, atransmitting member connected to the head, a transmitting member movableunder the power of the machine, and a member in constant connection withboth transmitting members and movable by the operator into either of twopositions, in one of which it renders the transmitting members effectiveand in the other of which they are inefiective.

30. In a heel-nailing machine, a nailing-block, a pressure-head movabletoward and from the nailing-block, a transmitting member connected tothe head, a transmitting member movable under the power of the machine,a swing-plate having heeland top-lift-holders and being movable underthe influence of the transmitting members, and a member connecting thetwotransmitting members and movable by the operator into either of twopositions, in one of which it renders the transmitting members efiectiveto cause movement of the pressure-head and swing-plate and in the otherof which they are inefiective.

31. In a heel-nailing machine, a nailing-block, a pressure-head movabletoward and from the nailing-block, a lever movable under the power ofthe machine, a lever connected to the pressure-head, a bell-crankfulcrumed upon one of the levers, a link joining the bell-crank to theother lever, and means arranged to hold the bellcrank in either of twoextreme positions.

32. In a heel-nailing machine, a nailing-block,

a pressure-head movable toward and from the nailing-block, a levermovable under the power of the machine, a lever connected to thepressure-head, a bell-crank fulcrumed upon one of the levers, a linkjoining the bell-crank to the other lever, and a spring connecting anarm of the bell-crank to the lever upon which it is mounted and adaptedto hold said bell-crank in one position in which it transmits the powerof the machine to the head and in another in which it may oscillateidly.

JOSEPH GOULDBOURN.

THOMAS AUBREY KESTELL.

